Here we discuss the introduction how does collect function work in scala? And examples, respectively. Also, we can use this function with any mutable and immutable collection data structure, which makes it more easy and more handy to use. You want to walk through all of the elements in a Scala sequence, comparing two neighboring elements as you walk through the collection. Scala's static types help avoid bugs in complex applications, and its JVM and JavaScript runtimes let you build high-performance systems with easy access to huge ecosystems of libraries. ![]() This is Recipe 10.20, How to Walk Through a Scala Collection with the reduce and fold Methods Problem. Scala combines object-oriented and functional programming in one concise, high-level language. ![]() Println("***********************************************************************")īy using the collect function, we can easily extract the data from the collection, which are of the same type. This is an excerpt from the 1st Edition of the Scala Cookbook (partially modified for the internet). touch sparkscala.txt vi sparkscala.txt 3.hdfs hdfs dfs -put sparkscala.txt /input //hdfsinput 4.spark-shell. This is simple to use and readable also.īelow find the more detailed syntax for its usage in scala: In the above lines of code, we can define a partial function, what it will take and what it is going to return. It will pick out all the elements from the given collection that will satisfies the partial function. Asking for help, clarification, or responding to other answers. ![]() This partial function will be responsible for performing the operation on the each element of the collection. Thanks for contributing an answer to Stack Overflow Please be sure to answer the question.Provide details and share your research But avoid. The collect function takes a partial function as the parameter. A Collect method is used whenever you want to extract a particular type of element from a collection that contains the elements belonging to different data. It will always return us the new collection as a result of the given collection element.ĭef collect(pf: PartialFunction): Traversable (This is as per the scala documentation) 1. We can call this function on any collection type, whether it is mutable or immutable. We know that the collect function in scala to collect the element from a collection that are of the same type.
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